chore: remove tests from .gitignore and add presigned URLs for course thumbnails in admin approval service

Backend/.gitignore

@@ -34,5 +34,3 @@ src/routes/routes.ts
 # Uploads (if storing locally)
 uploads/
 temp/
-
-tests

Backend/src/services/AdminCourseApproval.service.ts

@@ -3,6 +3,7 @@ import { config } from '../config';
 import { logger } from '../config/logger';
 import { UnauthorizedError, ValidationError, ForbiddenError, NotFoundError } from '../middleware/errorHandler';
 import jwt from 'jsonwebtoken';
+import { getPresignedUrl } from '../config/minio';
 import {
     ListPendingCoursesResponse,
     GetCourseDetailForAdminResponse,
@@ -51,12 +52,21 @@ export class AdminCourseApprovalService {
                 }
             });
 
-            const data = courses.map(course => ({
+            const data = await Promise.all(courses.map(async (course) => {
+                let thumbnail_presigned_url: string | null = null;
+                if (course.thumbnail_url) {
+                    try {
+                        thumbnail_presigned_url = await getPresignedUrl(course.thumbnail_url, 3600);
+                    } catch (err) {
+                        logger.warn(`Failed to generate presigned URL for thumbnail: ${err}`);
+                    }
+                }
+                return {
                     id: course.id,
                     title: course.title as { th: string; en: string },
                     slug: course.slug,
                     description: course.description as { th: string; en: string },
-                thumbnail_url: course.thumbnail_url,
+                    thumbnail_url: thumbnail_presigned_url,
                     status: course.status,
                 created_at: course.created_at,
                 updated_at: course.updated_at,
@@ -75,6 +85,7 @@ export class AdminCourseApprovalService {
                         created_at: course.courseApprovals[0].created_at,
                         submitter: course.courseApprovals[0].submitter
                     } : null
+                };
             }));
 
             return {
@@ -143,6 +154,16 @@ export class AdminCourseApprovalService {
                 throw new NotFoundError('Course not found');
             }
 
+            // Generate presigned URL for thumbnail
+            let thumbnail_presigned_url: string | null = null;
+            if (course.thumbnail_url) {
+                try {
+                    thumbnail_presigned_url = await getPresignedUrl(course.thumbnail_url, 3600);
+                } catch (err) {
+                    logger.warn(`Failed to generate presigned URL for thumbnail: ${err}`);
+                }
+            }
+
             return {
                 code: 200,
                 message: 'Course details retrieved successfully',
@@ -151,7 +172,7 @@ export class AdminCourseApprovalService {
                     title: course.title as { th: string; en: string },
                     slug: course.slug,
                     description: course.description as { th: string; en: string },
-                    thumbnail_url: course.thumbnail_url,
+                    thumbnail_url: thumbnail_presigned_url,
                     price: Number(course.price),
                     is_free: course.is_free,
                     have_certificate: course.have_certificate,

Backend/tests/k6/register-students.js

@@ -0,0 +1,105 @@
+// Backend/tests/k6/register-students.js
+// สคริปสำหรับ register นักเรียน 50 คน
+// email: studenttest01-50@example.com
+// username: student01-50
+// password: admin123
+
+import http from 'k6/http';
+import { check, sleep } from 'k6';
+import { Rate, Counter } from 'k6/metrics';
+
+// Custom metrics
+const errorRate = new Rate('errors');
+const successCount = new Counter('successful_registrations');
+const failCount = new Counter('failed_registrations');
+
+// Configuration: Run 50 iterations sequentially (1 VU to avoid duplicate)
+export const options = {
+  iterations: 50,
+  vus: 1, // 1 VU to ensure sequential registration (no duplicates)
+  thresholds: {
+    errors: ['rate<0.1'], // Error rate < 10%
+    http_req_duration: ['p(95)<3000'], // 95% of requests < 3s
+  },
+};
+
+const BASE_URL = __ENV.APP_URL || 'http://192.168.1.137:4000';
+
+export default function () {
+  // Calculate student number (1-50) based on iteration
+  // __ITER is unique per iteration across all VUs
+  const studentNum = __ITER + 1;
+  const paddedNum = String(studentNum).padStart(2, '0');
+  
+  const email = `studenttest${paddedNum}@example.com`;
+  const username = `student${paddedNum}`;
+  const password = 'admin123';
+
+  console.log(`Registering student: ${username} (${email})`);
+
+  const payload = JSON.stringify({
+    username: username,
+    email: email,
+    password: password,
+    first_name: `Student`,
+    last_name: `Test${paddedNum}`,
+    prefix: {
+      en: 'Mr.',
+      th: 'นาย'
+    },
+    phone: `08${paddedNum}000000${paddedNum}`,
+  });
+
+  const headers = {
+    'Content-Type': 'application/json',
+  };
+
+  const res = http.post(`${BASE_URL}/api/auth/register-learner`, payload, { headers });
+
+  const isSuccess = res.status === 200 || res.status === 201;
+  const isAlreadyExists = res.status === 400 && res.body && res.body.includes('already');
+
+  errorRate.add(!isSuccess && !isAlreadyExists);
+
+  if (isSuccess) {
+    successCount.add(1);
+    console.log(`✓ Successfully registered: ${username}`);
+  } else if (isAlreadyExists) {
+    console.log(`⚠ Already exists: ${username}`);
+  } else {
+    failCount.add(1);
+    console.log(`✗ Failed to register: ${username} - Status: ${res.status} - ${res.body}`);
+  }
+
+  check(res, {
+    'registration successful or already exists': (r) => r.status === 200 || r.status === 201 || r.status === 400,
+    'response time < 3s': (r) => r.timings.duration < 3000,
+  });
+
+  sleep(0.5); // Small delay between registrations
+}
+
+export function handleSummary(data) {
+  return {
+    'stdout': textSummary(data, { indent: ' ', enableColors: true }),
+  };
+}
+
+function textSummary(data, opts) {
+  const metrics = data.metrics;
+  const iterations = metrics.iterations ? metrics.iterations.values.count : 0;
+  const successRegs = metrics.successful_registrations ? metrics.successful_registrations.values.count : 0;
+  const failRegs = metrics.failed_registrations ? metrics.failed_registrations.values.count : 0;
+  
+  return `
+=====================================
+  Student Registration Summary
+=====================================
+  Total Iterations: ${iterations}
+  Successful Registrations: ${successRegs}
+  Failed Registrations: ${failRegs}
+  Error Rate: ${(metrics.errors.values.rate * 100).toFixed(2)}%
+  Avg Response Time: ${metrics.http_req_duration.values.avg.toFixed(2)}ms
+=====================================
+`;
+}

Backend/tests/k6/test-credentials.json

@@ -0,0 +1,54 @@
+{
+  "students": [
+    { "email": "studenttest01@example.com", "username": "student01", "password": "admin123" },
+    { "email": "studenttest02@example.com", "username": "student02", "password": "admin123" },
+    { "email": "studenttest03@example.com", "username": "student03", "password": "admin123" },
+    { "email": "studenttest04@example.com", "username": "student04", "password": "admin123" },
+    { "email": "studenttest05@example.com", "username": "student05", "password": "admin123" },
+    { "email": "studenttest06@example.com", "username": "student06", "password": "admin123" },
+    { "email": "studenttest07@example.com", "username": "student07", "password": "admin123" },
+    { "email": "studenttest08@example.com", "username": "student08", "password": "admin123" },
+    { "email": "studenttest09@example.com", "username": "student09", "password": "admin123" },
+    { "email": "studenttest10@example.com", "username": "student10", "password": "admin123" },
+    { "email": "studenttest11@example.com", "username": "student11", "password": "admin123" },
+    { "email": "studenttest12@example.com", "username": "student12", "password": "admin123" },
+    { "email": "studenttest13@example.com", "username": "student13", "password": "admin123" },
+    { "email": "studenttest14@example.com", "username": "student14", "password": "admin123" },
+    { "email": "studenttest15@example.com", "username": "student15", "password": "admin123" },
+    { "email": "studenttest16@example.com", "username": "student16", "password": "admin123" },
+    { "email": "studenttest17@example.com", "username": "student17", "password": "admin123" },
+    { "email": "studenttest18@example.com", "username": "student18", "password": "admin123" },
+    { "email": "studenttest19@example.com", "username": "student19", "password": "admin123" },
+    { "email": "studenttest20@example.com", "username": "student20", "password": "admin123" },
+    { "email": "studenttest21@example.com", "username": "student21", "password": "admin123" },
+    { "email": "studenttest22@example.com", "username": "student22", "password": "admin123" },
+    { "email": "studenttest23@example.com", "username": "student23", "password": "admin123" },
+    { "email": "studenttest24@example.com", "username": "student24", "password": "admin123" },
+    { "email": "studenttest25@example.com", "username": "student25", "password": "admin123" },
+    { "email": "studenttest26@example.com", "username": "student26", "password": "admin123" },
+    { "email": "studenttest27@example.com", "username": "student27", "password": "admin123" },
+    { "email": "studenttest28@example.com", "username": "student28", "password": "admin123" },
+    { "email": "studenttest29@example.com", "username": "student29", "password": "admin123" },
+    { "email": "studenttest30@example.com", "username": "student30", "password": "admin123" },
+    { "email": "studenttest31@example.com", "username": "student31", "password": "admin123" },
+    { "email": "studenttest32@example.com", "username": "student32", "password": "admin123" },
+    { "email": "studenttest33@example.com", "username": "student33", "password": "admin123" },
+    { "email": "studenttest34@example.com", "username": "student34", "password": "admin123" },
+    { "email": "studenttest35@example.com", "username": "student35", "password": "admin123" },
+    { "email": "studenttest36@example.com", "username": "student36", "password": "admin123" },
+    { "email": "studenttest37@example.com", "username": "student37", "password": "admin123" },
+    { "email": "studenttest38@example.com", "username": "student38", "password": "admin123" },
+    { "email": "studenttest39@example.com", "username": "student39", "password": "admin123" },
+    { "email": "studenttest40@example.com", "username": "student40", "password": "admin123" },
+    { "email": "studenttest41@example.com", "username": "student41", "password": "admin123" },
+    { "email": "studenttest42@example.com", "username": "student42", "password": "admin123" },
+    { "email": "studenttest43@example.com", "username": "student43", "password": "admin123" },
+    { "email": "studenttest44@example.com", "username": "student44", "password": "admin123" },
+    { "email": "studenttest45@example.com", "username": "student45", "password": "admin123" },
+    { "email": "studenttest46@example.com", "username": "student46", "password": "admin123" },
+    { "email": "studenttest47@example.com", "username": "student47", "password": "admin123" },
+    { "email": "studenttest48@example.com", "username": "student48", "password": "admin123" },
+    { "email": "studenttest49@example.com", "username": "student49", "password": "admin123" },
+    { "email": "studenttest50@example.com", "username": "student50", "password": "admin123" }
+  ]
+}